我在centos上创建了一个kafka docker镜像。在这里，我在同一张图片上运行Zookeeper和Kafka服务器。
我看到服务已在docker容器内启动并运行。我通过Kafka提供的kafka-console-producer.sh和kafka-console-consumer.sh脚本测试了kafka。所需的端口也会暴露出来。
PORTS
0.0.0.0:2182->2182/tcp, 22/tcp, 0.0.0.0:9093->9093/tcp
以下是在Kafka的server.properties中完成的配置：
listeners=PLAINTEXT://0.0.0.0:9093
zookeeper.connect=localhost:2182
我在docker容器中创建了一个主题。
我可以在运行我的docker镜像的主机上使用telnet命令通过外部计算机（在同一网络中）访问Kafka服务。
telnet 9093
Trying …
Connected to .
Escape character is ‘^]’.
telnet 2182
Trying …
Connected to .
Escape character is ‘^]’.
但是，使用TimeoutExceptions将数据写入Kafka主题失败：
2017-12-17 21:30:51 DEBUG NetworkClient:195 - [Producer clientId=KafkaExampleProducer] Using older server API v0 to send API_VERSIONS {} with correlation id 1 to node -1
2017-12-17 21:30:51 DEBUG NetworkClient:189 - [Producer clientId=KafkaExampleProducer] Recorded API versions for node -1: (Produce(0): 0 to 2 [usable: 2], Fetch(1): 0 to 2 [usable: 2], ListOffsets(2): 0 [usable: 0], Metadata(3): 0 to 1 [usable: 1], LeaderAndIsr(4): 0 [usable: 0], StopReplica(5): 0 [usable: 0], UpdateMetadata(6): 0 to 2 [usable: 2], ControlledShutdown(7): 1 [usable: 1], OffsetCommit(8): 0 to 2 [usable: 2], OffsetFetch(9): 0 to 1 [usable: 1], FindCoordinator(10): 0 [usable: 0], JoinGroup(11): 0 [usable: 0], Heartbeat(12): 0 [usable: 0], LeaveGroup(13): 0 [usable: 0], SyncGroup(14): 0 [usable: 0], DescribeGroups(15): 0 [usable: 0], ListGroups(16): 0 [usable: 0], SaslHandshake(17): 0 [usable: 0], ApiVersions(18): 0 [usable: 0], CreateTopics(19): UNSUPPORTED, DeleteTopics(20): UNSUPPORTED, DeleteRecords(21): UNSUPPORTED, InitProducerId(22): UNSUPPORTED, OffsetForLeaderEpoch(23): UNSUPPORTED, AddPartitionsToTxn(24): UNSUPPORTED, AddOffsetsToTxn(25): UNSUPPORTED, EndTxn(26): UNSUPPORTED, WriteTxnMarkers(27): UNSUPPORTED, TxnOffsetCommit(28): UNSUPPORTED, DescribeAcls(29): UNSUPPORTED, CreateAcls(30): UNSUPPORTED, DeleteAcls(31): UNSUPPORTED, DescribeConfigs(32): UNSUPPORTED, AlterConfigs(33): UNSUPPORTED, AlterReplicaLogDirs(34): UNSUPPORTED, DescribeLogDirs(35): UNSUPPORTED, SaslAuthenticate(36): UNSUPPORTED, CreatePartitions(37): UNSUPPORTED)
2017-12-17 21:30:51 DEBUG NetworkClient:189 - [Producer clientId=KafkaExampleProducer] Sending metadata request (type=MetadataRequest, topics=sifs.email.in) to node <IP>:9093 (id: -1 rack: null)
2017-12-17 21:30:51 DEBUG NetworkClient:195 - [Producer clientId=KafkaExampleProducer] Using older server API v1 to send METADATA {topics=[sifs.email.in]} with correlation id 2 to node -1
2017-12-17 21:30:52 DEBUG Metadata:270 - Updated cluster metadata version 2 to Cluster(id = null, nodes = [0.0.0.0:9093 (id: 0 rack: null)], partitions = [Partition(topic = sifs.email.in, partition = 0, leader = 0, replicas = [0], isr = [0], offlineReplicas = [])])
2017-12-17 21:30:52 DEBUG NetworkClient:183 - [Producer clientId=KafkaExampleProducer] Initiating connection to node 0.0.0.0:9093 (id: 0 rack: null) org.apache.kafka.common.errors.TimeoutException: Expiring 50 record(s) for sifs.email.in-0: 55017 ms has passed since batch creation plus linger time org.apache.kafka.common.errors.TimeoutException: Expiring 50 record(s) for sifs.email.in-0: 55017 ms has passed since batch creation plus linger time org.apache.kafka.common.errors.TimeoutException: Expiring 50 record(s) for sifs.email.in-0: 55017 ms has passed since batch creation plus linger time org.apache.kafka.common.errors.TimeoutException: Expiring 50 record(s) for sifs.email.in-0: 55017 ms has passed since batch creation plus linger time org.apache.kafka.common.errors.TimeoutException: Expiring 50 record(s) for sifs.email.in-0: 55017 ms has passed since batch creation plus linger time org.apache.kafka.common.errors.TimeoutException: Expiring 50 record(s) for sifs.email.in-0: 55017 ms has passed since batch creation plus linger time
2017-12-17 21:31:47 INFO KafkaProducer:341 - [Producer clientId=KafkaExampleProducer] Closing the Kafka producer with timeoutMillis = 9223372036854775807 ms.
2017-12-17 21:31:47 DEBUG Sender:177 - [Producer clientId=KafkaExampleProducer] Beginning shutdown of Kafka producer I/O thread, sending remaining records.
让我知道如何从外部机器向Kafka主题写入数据。
答案 0 :(得分：0)
此步骤解决了我从docker容器外部连接的问题：
https://stackoverflow.com/a/51071716/2493852